EP1339941A1 - Dispositifs de deconnexion ameliores - Google Patents

Dispositifs de deconnexion ameliores

Info

Publication number
EP1339941A1
EP1339941A1 EP01998160A EP01998160A EP1339941A1 EP 1339941 A1 EP1339941 A1 EP 1339941A1 EP 01998160 A EP01998160 A EP 01998160A EP 01998160 A EP01998160 A EP 01998160A EP 1339941 A1 EP1339941 A1 EP 1339941A1
Authority
EP
European Patent Office
Prior art keywords
slip
coupling
coupling component
depression
protrusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01998160A
Other languages
German (de)
English (en)
Other versions
EP1339941B1 (fr
Inventor
Rodney Gordon Bowles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weatherford Lamb Inc
Original Assignee
Weatherford Lamb Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weatherford Lamb Inc filed Critical Weatherford Lamb Inc
Priority to EP09175549.6A priority Critical patent/EP2146047B1/fr
Publication of EP1339941A1 publication Critical patent/EP1339941A1/fr
Application granted granted Critical
Publication of EP1339941B1 publication Critical patent/EP1339941B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/06—Releasing-joints, e.g. safety joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
    • E21B23/0413—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion using means for blocking fluid flow, e.g. drop balls or darts

Definitions

  • the present invention relates to disconnect devices - releasable connectors - that are used downhole in oil or gas wells.
  • the invention is particularly, though not necessarily exclusively, relevant to hydraulic disconnects as are used in coiled tubing workstrings to release the bottom hole assembly of the workstring in a controlled fashion.
  • the disconnect device takes the form of a tubular body 1 that is an intermediate sub between an upper sub 2 and lower sub 3 of the workstring.
  • This tubular body, or intermediate sub, 1 accommodates a tubular mandrel/bobbin 4 extending along its bore and which is retained in an initial position as illustrated by shear screws/pins 5.
  • This mandrel/bobbin 4 in its initial position cooperatively engages with and thereby supports a collet 6 that is integrally assembled with the lower sub 3 and thereby the upper sub 2 supports the lower sub 3 by the mandrel 4 and collet 6.
  • the collet 6 takes tensile loads on the workstring, preventing the disconnect from being parted during normal use of the workstring until the disconnect is actuated by hydraulic control.
  • a steel ball 7 is dropped down the bore of the workstring to fall the level of the disconnect device and seat on the top of the bobbin/mandrel 4, blocking the bore of the mandrel 4 and forming a pressure tight seal against it so that when fluid pressure is applied over the mandrel 4 this acts over the diameter of the seal and the applied force shears the shear pins/screws 5, allowing the mandrel 4 to move downwards to its second position.
  • the disconnect device has, instead of a collet, a set of turned slips that are supported on a mandrel accommodated in the bore of the disconnect body.
  • These slips are generally formed by splitting a tubular component into segments, the component having been turned through 360° to provide a chcumferential recess.
  • These slips are more compact, needing less workstring length, than the corresponding collet-based prior art system. They are arranged to locate into a secondary internal profile and hence when parted give a clean fresh fishneck profile for future retrieval operations.
  • the collet system because they have a turned, 360° circumferential, profile they lack any torsional capacity and are accordingly provided with keying castellations. As with the collet-based device, these castellations can interfere with fishing operations.
  • a disconnect device for use as part of a tubing string downhole in an oil or gas well and which comprises a tubular body, at least one slip held within the tubular body, and a sleeve housed within the tubular body to hold the at least one slip in coupling engagement with at least one of a coupling component of an upper sub and a coupling component of a lower sub, in use, the sleeve being selectively moveable relative to the at least one slip to release the slip and thereby release the coupling, wherein the slip cooperatively engages with at least one of the coupling component of the upper sub and the coupling component of the lower sub by means of at least one localised protrusion on the slip or on the coupling component extending into a correspondingly shaped local depression or hole in the other of the at least one slip and the coupling component whereby tensile load and torque may be transmitted by the coupling, that part of the device which is to be released and left downhole by releasing the coupling
  • each depression or hole is a local depression or hole, i.e. it does not extend as a notch or groove around the full circumference of the coupling component or slip assembly.
  • the at least one protrusion is substantially convex and the at least one correspondingly shaped depression or hole is concave.
  • the at least one depression or hole is concave and the at least one protrusion is correspondingly convex, contributing to the strength and integrity of the connection formed between the depression or hole and protrusion axially and rotationally, while facilitating makeup of the connection and limiting wear.
  • the device has a said at least one depression in the at least one of the coupling components or the slip, the depression or protrusion suitably being formed by plastic deformation of the material of the coupling component or slip.
  • the device suitably has three or more said protrusions and corresponding depressions or holes at circumferentially spaced intervals around the tubular body.
  • the at least one slip has a localised protrusion on its internal diameter which cooperatively engages with a corresponding hole or depression in the outside diameter of the corresponding coupling component.
  • the at least one slip has, at a first end thereof, at least one localised protrusion or depression to cooperatively engage with a corresponding localised depression or protrusion, respectively, on an upper sub coupling component and has, at a second end thereof, at least one localised protrusion or depression to cooperatively engage with a corresponding localised depression or protrusion, respectively, of a lower sub coupling component.
  • the device preferably comprises a said upper sub and lower sub with said tubular body therebetween as an intermediate sub.
  • the sleeve housed within the tubular body ensheathes the at least one slip.
  • this sleeve is adapted to be left downhole following release of the connection and has the fishneck configuration formed therein.
  • a releasable connector for releasably connecting a first tube of tubing string for use downhole in oil and gas well operations with a second tube of tubing string
  • the releasable connector comprising a connector body housing at least one slip, and a sleeve housed within the tubular body to hold the slip in coupling engagement with at least one of the first tube of tubing string and the second tube of tubing string, in use, the sleeve being selectively moveable relative to the at least one slip to release the slip and thereby release the coupling, wherein the slip cooperatively engages with the first tube of tubing string and the second tube of tubing string by means of at least one localised protrusion on the slip or on the first or second tube extending into a correspondingly shaped local depression in the other of the at least one slip and the first or second tube.
  • Figures 2A and 2B are, respectively, longitudinal sectional views of the preferred embodiment of disconnect device in an initial coupled state and in a second released state;
  • Figure 3 A - 3D are, respectively, a longitudinal sectional view of a disconnect dog (slip assembly) of the disconnect device, a side elevation view of the same and transverse sectional views taken along the lines X-X and Y-Y;
  • Figure 4 is a longitudinal sectional view of the top sub of the device;
  • Figure 5 is a longitudinal sectional view of the tubular body of the device;
  • Figures 6A, 6B and 6C are, respectively, a longitudinal sectional view of the bottom sub of the device and transverse sectional views taken along the lines M-M and
  • Figures 7A, 7B and 7C are, respectively, a longitudinal sectional view of a mandrel of the disconnect device and transverse sectional views of the same taken along the lines O-O and P-P; and
  • Figure 8 is a longitudinal sectional view of a sleeve of the disconnect device.
  • the preferred embodiment of disconnect tool has an overall configuration that is similar to that of the prior art disconnect tool of Figure 1 in having a top sub 1, intermediate sub/tubular disconnect body 2 and lower/bottom sub 3.
  • the device of the present invention also has a tubular coupling component that extends within the bore of the intermediate sub/disconnect body 2 and which is releasably coupled to the lower sub 3.
  • the disconnect tool/device of the present invention has no collet but instead has a slip assembly 8, the upper in use end of which cooperatively engages with a lower in use end of a tubular coupling component, or mandrel, 9 threaded to the top sub 1.
  • the lower in use end of the slip assembly 8 couples with an upper in use end of a similar tubular component 11 extending upwardly from the lower sub 3.
  • the tubular coupling component 11 of the lower sub 3 is formed integrally with the lower sub 3.
  • the slip assembly 8 is suitably formed as two or more and preferably three segments that assemble around the lower in use end of the coupling component 9 of the top sub 1 and the upper in use end of the coupling component 11 of the lower sub 3 as a sheath encircling them and which is in turn ensheathed witfiin a sleeve 10.
  • the slip 8 segments are mounted in place to cooperatively engage with the respective upper and lower tubular coupling components 9, 11, they are held in place by the sleeve 10 which in turn is closely accommodated within the bore of the intermediate sub/tubular disconnect body 2.
  • the sleeve 10 is fixed in place longitudinally of the disconnect body 2 by shear pins 13 which lock the connection in the coupled state, as illustrated in Figure 2 A.
  • the device of the present invention has highly distinctive slips which cooperatively engage with the tubular coupling components of the top sub 1 and bottom sub 3 by means of dimple-shaped protrusions on the slip or on the connector component which cooperatively engage with corresponding dimple-shaped recesses on the other.
  • the slip assembly 8 (see Figure 3) is formed with a plurality of dimple depressions formed from the outside of the slip assembly by locally pressing several steel balls or the like, for example, into the outer face of the slip assembly 8, whereby the radially inner face of the slip assembly 8 is deformed to have a plurality of dimple-shaped protrusions 18 extending radially inwardly. These engage, in use, with corresponding dimple-shaped recesses 19 in the radially outer face of the upper and lower coupling components (see Figures 6 and 7).
  • the slip assembly 8 may alternatively be cast or otherwise formed to have the desired integral protrusions 18.
  • the recesses 19 are suitably pre-machined into the upper and lower coupling components 9, 11.
  • the protrusions 18 may be provided on the upper and lower coupling components.
  • the releasable connection formed is able to transmit not only tensile load but also torque without the need for provision of separate keying castellations and without keying splines or lugs that are independent and vulnerable to damage.
  • a ball 7 may be dropped down the bore of the workstring to lodge against a seat formed within the bore of the disconnect tool, whereby applying hydraulic fluid pressure down the bore of the workstring will lead to hydraulic pressure being diverted laterally from the drop ball 7 that now occludes the bore of the tool out through lateral channels 20 in the upper coupling component 9.
  • the pressure of the diverted hydraulic fluid acts on the upper end edge of the sleeve 10 causing the shearpin 13 to shear and the sleeve 10 to shift longitudinally downwardly within the tubular body 2 to its second, released, position as indicated in Figure 2B and whereupon the slip assembly 8 is no longer constrained in position, moves radially outwardly, the segments moving apart and allows the component of the top sub 1 to become decoupled from the coupling component 11 of the bottom sub 3.
  • the disconnect tool When the disconnect tool is in the second/release position, pressure integrity is lost and the operator will see a drop in pressure indicative of movement of the sleeve 10.
  • the upper part of the toolstring may be retracted complete with the top sub 1 and associated coupling component 9 and drop ball 7, leaving the bottom sub 3 with a clean fishing neck 30 (being a configuration of the bore of the tool having a narrowing defining a lip/shoulder against which a standard fishing tool may engage).
  • This fishing neck 30 has not previously seen tensile load and is free from any keying castellations or the like which would otherwise make fishing for and retrieval of the bottom hole assembly awkward.
  • the device may be configured for retrieval of the shps and/or sleeve with the upper sub of the toolstring, suitably by linking the shps and/or sleeve to the upper sub/upper coupling component of the device.
  • the fishing neck 30 would be provided on the bottom sub rather than on the sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention se rapporte à un dispositif de déconnexion utilisé comme partie d'une colonne de production de fond dans un puits à pétrole ou à gaz et équipé d'un corps tubulaire (2), d'au moins un coin de retenue (8) maintenu dans le corps tubulaire (2), et d'un manchon (10) logé à l'intérieur du corps tubulaire (2) afin de retenir au moins un coin de retenue (8) en position de couplage avec au moins un élément de couplage d'une réduction supérieure (1) et un élément de couplage d'une réduction inférieure (3). Lors de l'utilisation dudit dispositif, le manchon (10) peut être au choix positionné mobile par rapport à au moins un coin de retenue (8) afin de pouvoir libérer le coin et ainsi libérer le couplage à l'intérieur duquel le coin (8) vient facilement en prise avec l'élément de couplage de la réduction supérieure (1) et/ou l'élément de couplage de la réduction inférieure (3) au moyen d'au moins une saillie (18) localisée sur le coin de retenue ou sur l'élément de couplage qui s'étend le long d'une dépression locale ou d'un trou local (19) de forme similaire situé(e) dans au moins un autre coin de retenue et dans l'élément de couplage permettant ainsi au couplage de fournir un effort de traction ou une pression. La partie du dispositif devant être libérée et laissée au fond grâce à la libération du couplage présente une configuration en forme de collier de repêchage afin de pouvoir procéder à une extraction ultérieure au moyen d'un outil de repêchage.
EP01998160A 2000-11-29 2001-11-27 Dispositifs de deconnexion ameliores Expired - Lifetime EP1339941B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09175549.6A EP2146047B1 (fr) 2000-11-29 2001-11-27 Dispositif de désaccouplement

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0029097 2000-11-29
GBGB0029097.3A GB0029097D0 (en) 2000-11-29 2000-11-29 Dimple disconnect
PCT/GB2001/005233 WO2002044513A1 (fr) 2000-11-29 2001-11-27 Dispositifs de deconnexion ameliores

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP09175549.6A Division EP2146047B1 (fr) 2000-11-29 2001-11-27 Dispositif de désaccouplement

Publications (2)

Publication Number Publication Date
EP1339941A1 true EP1339941A1 (fr) 2003-09-03
EP1339941B1 EP1339941B1 (fr) 2009-11-11

Family

ID=9904100

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09175549.6A Expired - Lifetime EP2146047B1 (fr) 2000-11-29 2001-11-27 Dispositif de désaccouplement
EP01998160A Expired - Lifetime EP1339941B1 (fr) 2000-11-29 2001-11-27 Dispositifs de deconnexion ameliores

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09175549.6A Expired - Lifetime EP2146047B1 (fr) 2000-11-29 2001-11-27 Dispositif de désaccouplement

Country Status (7)

Country Link
US (1) US7152674B2 (fr)
EP (2) EP2146047B1 (fr)
AU (1) AU2002220832A1 (fr)
CA (1) CA2430303C (fr)
DE (1) DE60140479D1 (fr)
GB (2) GB0029097D0 (fr)
WO (1) WO2002044513A1 (fr)

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Also Published As

Publication number Publication date
CA2430303A1 (fr) 2002-06-06
US20040045704A1 (en) 2004-03-11
GB2369634B (en) 2005-03-09
CA2430303C (fr) 2008-04-15
WO2002044513A1 (fr) 2002-06-06
EP2146047A2 (fr) 2010-01-20
EP2146047A3 (fr) 2012-04-04
GB2369634A (en) 2002-06-05
US7152674B2 (en) 2006-12-26
AU2002220832A1 (en) 2002-06-11
EP1339941B1 (fr) 2009-11-11
GB0029097D0 (en) 2001-01-10
DE60140479D1 (de) 2009-12-24
GB0128336D0 (en) 2002-01-16
EP2146047B1 (fr) 2013-06-19

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